from flask_login import LoginManager
from functools import wraps
from flask import request, redirect, url_for

# 权限验证函数示例
def login_required(f):
    @wraps(f)
    def decorated_function(*args, **kwargs):
        if not current_user.is_authenticated:
            return redirect(url_for('login'))
        return f(*args, **kwargs)
    return decorated_function